Method of coiling pipe.



L. G. SCHNEIDER.

METHOD OF COILING PIPE.

1 APPLICATION FILED AUG. 21, 1908.

Patented July 13, 1909.

2 SHEETS-SHBET 1.,

Svwentoz EEEEEE 12E Q) in eooao L. G. SCHNEIDER.

METHOD OF GOILING PIPE.

APPLICATION FILED AUG, 21, 1908.

Patented July 13, 1909.

2 SHEETS-SHEET 2 UNITED STATES PATENT ounce. LEOPOLD C. SCHNEIDER, OFPHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE PHILADELPHIA PIPE BENDINGCOMPANY, A CORPORATION OF NEW JERSEY.

METHOD OF COILING PIPE.

Specification of Letters Patent.-

Patented July 13, 1909.

Application filed August 21, 1908. Serial No. 449,626.

To all whom it may concern:

Be it known that I, LEOPOLD C. SCHNEIDER, a citizen of the UnitedStates, residing in the city and county of Philadelphia, State ofPennsylvania, have invented new and useful Im rovements in Methods ofCoiling Pipe, 0 which the following is a specificatlon.

My invention relates to improvements in a method for coiling or bendingpipes or rods, composed of metal such as wrought iron or ot ermaterials, and particularly to cold bending or coiling.

Pipes, rods or other articles of wrought iron or other material areununiform, as bou ht in the open market, in hardness,

, thic ness, or in other regards, and in coiling them in the old wayandby the old appa ratus, uniformity of bending, coiling, etc. is notattained because of this lack of uniformity in the stock material.

It is the object of my invention to produce bends or coils uniform incurvature or shape e irrespective of this lack of uniformity in tmaterial to be bent or coiled.

I have found that by operating upon the pipes or rods in such manner asto cause them to tend to forma coil of a diameter less than the desiredfinlshed diameter, and then in the same operation continuously operatingupon them in opposite direction to causethem to form a coil of desireddiameter, the coil of desired diameter when so formed is perfectly.uniform irrespective of the lack of uniformity in the stock material.

My invention resides, therefore, in the method which consists inoverbending the rods or pipes and then bending them back to the desiredshape or curvature.

My invention resides also in other features heremafter described andclaimed. For an explanation of my method and for an illustration of oneof the forms my apparatus may take for carrying out my method,

reference is to be had to the accompanying drawings in which:

\ Fi re 1. is a fragmentaryplan view of a bendlng or coiling machine.Fig. 2 is a lan view of my improved coihng or ben ing machine showinirther attachments. Fig. 3 is a view part yin elevation, partly'insection, showing the means for adjusting and holding the auxiliary backbending means. tion, partly in section, of the back bending means.

Referring to the drawings: A base plate 1, of iron or other suitablematerial, has mountcd thereona vertical spindle 2 driven by an electricmotor, belt or other suitable source of power. gear 3 which meshes withand drives the gear 4 mounted upon the spindle 5. Carried by thespindles 2 and '5 respectively are the rollers 6' and 7 having concaverims to receivethe pipe, rod, or other stock, as well understood in theart. The gear 4 and roller 7, mounted upon the spindle 5, are adjustabletoward and away from the gear 3 and roller 6 by the screw 8 operating inthe bracket 9, and square-headed at 10 to receive a wrench or the like.Upon the spindle 11 1s mounted Flg. 4 is a vertical eleva- Secured tothis spindle 2 is the a roller 12, also of concave rim and slidablemounted upon the spindle 17 and adjustable and outwardly by the screw 18inwardly bracket 19 and square-headed operating in at 20.

The brackets 21 and 22, bolted to the base plate 1, are alined with eachother and support" and secure the bar 23 whichmay be of square or othersuitablecross section. Movable along the bar 23 is the clamp 24 whichmay be clamped securely to the bar 23 at any desirableposition. Asseenin F1 g. 3, the cl amp 24 embraces the bar 23 and may be clamped snuglythereto by tightening the bolt 25 The top of the clamp 24 is recessedto-recelve the cylindrical pin or pivot 26 secured to or mtegral withthe clamp 27 whlch embraces the bar 28 which may be snugly clampedthereto by the bolts .29. The pivot 26 has an annular groove 30 in whichmay engage the end of the screw 31 threaded in the bracket 24;, thusreventing the clam 27 from lifting out 0 or away from the 0 amp 24. Bytms pivotal. connection between the clamps they may each be adjusted todifferent positlons with respect to their respgctlve bars 23 and 28 andthe bar 28 may ad usted to d1fformity ferent angular positions withrespect to the bar 23.

Upon the bar 28 is mounted the roller 32, having a concave rim, andmounted upon the spindle 33 carried by the rod 28. Beyond the roller 32is a similar roller34, mounted upon a spindle or pin 35 carried by theblock 36 which is slidable inwardly and outwardly on the bar 28 by meansof the screw 39 provided with the hand crank 38, as seen in detail inFig. 4.

In the base late 1 are provided a plurality of holes as 39, in which maybe placed a pin or pins to prevent the rod 28 from rotating about thepivot 26 during operation.

The operation is as follows: The pipe, rod or other stock 40 is fed infrom the left,as viewed in Fig. 1, between the rollers 6 and 7, and liesagainst the roller 12. Due to friction and the power delivered throughthe spindle 2, the stock 40 is drawn toward the right and engages in theconcave periphery of the roller 16. This roller is set in, by screw 18,a sufiicient distance to cause the pipe to coil or bend, as wellunderstood in the art. This preliminary coiling or bending is, ineffect, local overbending or coiling, as indicated at L. Assuming thatit is desired to produce a bend or coil'of a diameter of say three feet,the roller 16 is set in far enough to overbend or overcoil the stock soas to tend to form a bend or coil of a diameter of less than three feet.The pipe or stock 40 is, however, guided between the rollers 32 and 34which are set out far enough to determine a coil or bend of three feetdiameter, the operation being a local bending back again after leavingroller 16 from the lesser diameter to the greater or finish diameter ofthree feet. This back bending or back coiling is accomplished locally inthe region indicated by L By this overbending and bending back again,the bend or coil will take the desired finishdiameter and the diameterwill be uniform, whereas, by merely setting the roller 16 in to a pointto produce a three foot bend or coil, the finished bend or coil will notbe uniformly of three feet diameter but will vary considerably due tothe lack of uniin the properties and qualities of the stock.

It will be noted that by my method or process the overbending orovercoiling and the bending back or coiling back is accomplished withinless than a complete turn or coil and,

' indeed, within a small fraction of a complete bend or coil, as thepreferred method. Thus, the overbending or overcoiling is accomplishedat roller 16 and immediately thereafter, within a fraction of a completeturn of the coil, at rollers 32 and 34, the

bending back or coiling back is accomplished.

The bars 23 and 28 may have suitable g'raduations, such as 41 and 42, bywhich the position of the rolls 32 and 34 with respect to the otherrolls may be accurately de-' termined. Thus the distance of the centerof the pin 26 from the axis of the stock 40 as it passes between therolls 6 and 7 may be made the same or different from the distancebetween the center of the pin 26 and'the axis of the stock 40 as itpasses between the rolls 32 and From the foregoing description of theoperation o my apparatus, my process is also understood. Myin'iprovenient resides in overbending or overcoiling the stock and thenbending it out again to the desired finish diameter, and as explained bythis process a practically uniform bend or coil can be producednotwithstanding the lack of uniformity in the properties or qualities otthe stock at various points throughout its length. I have found that bythis method and apparatus, the capacity of the machine is .very greatlyincreased, so that while a uniform bend or coil is produced it is madeat far less cost-than heretofore.

Vhile I have shown two rollers 32 and 34 for the bending back operation,it is to be understood that the roller 34 may be omitted, though thepresence of the second roller 34 is preferable.

In Fig. 2 the parts illustrated are the same as in Fig. 1 except.- thatupon the base plate 1 there may be provided a single roll idler 43 orthe double roll idler 44 having the two rolls 45 and 46, the latteradjustable by a screw 37 and hand crank 38. It is to be understood alsothat the idlers, Whether single or double roll, may be multiplied innumber.

While the advantages of my process and apparatus 'are available to thebending of stock in heated condition, it is particularly adaptable tothe cold bending or coiling of pipes, rods and other stock.

What I claim is:

1. As an improvement in the art of coiling pipe while cold, the methodwhich consists iii-continuously locally operating upon the pipe to causethe same to tend to take a diameter less than the desired finishdiameter, and then continuously locally operating diameter other thanfinish diameter, and T then, before a complete coil convolution or turnis formed, continuously bending the pipe or rod to a different curvatureto form a coil of desired diameter.

3. As an improvement in the art of cold coil of uniform curvature.

coiling pipe, the method which consistsin 4. Asan improvement in the artof coiling pipe while cold, the method which consists in continuouslycoiling the pipe to acurvature sharper than the finish. curvature,andthen, before the completion-of a convolution "or turn of the coil,continuously bending the pipe in opposite direction to cause the same totake desired'uniform curvature.

5. As an improvement in the art of coiling rod or pipe While cold, themethod which consists in continuously overbending the pipe or rodtocause the same to tend to form a coil, and then, before the completionof a convolution or turn of the coil, continuously bendin the pipe orrod back again to form an uniform coil of desired curvature.

6. As an improvement in the art of coiling pipe or rod while cold, themethod which consists in continuously feeding the pipe or rod andcontinuously overbending thesame, tending to form a'coil of lessdiameter than the desired finish diameter, and then, before thecompletion of a convolution or turn'of the coil, continuously bendingthe pipe or rod in opposite direction to desired finish diameter whilecontinuously fed to .form an uniform coil.

7. As an improvement in the art of coiling pipe or rod While cold, themethod which consists in continuously feeding the pipe or rod andcontinuously overbending the same tending to form a coil of a diameterless than the desired finish diameter, and then, .during said continuousfeeding and before a convolution isformed, continuously bending saidpipe or rod in opposite direction to form an uniform coil.

8. As an improvement in the-art of coiling pipe or rod While cold,themethod which consists in continuously feeding the rod or pipe andcontinuously roller bending the same to a curvature sharper than thedesired finish curvature, and then, while continuously fed, rollerbending said pipe or rod back in opposite direction to form an uniformcoil.

9. As an improvement in the art of coiling pipe or rod while cold, themethod which consists in continuously feeding the pipe or rod andcontinuously roller bending the same tending to form a coil of adiameter less than the desired finish diameter, and then, before thecompletion of a convolution or turn of the coil roller bending the pipeor rod in opposite'direction to desired finish curvature to form anuniform coil.

10. As an improvement in the art of coiling pipe, the method whichconsists in continuously locally bending the pipe so that it tends totake a curvature sharper than the desired finish curvature, and then,before the completion of a convolution or turn. of the coil,continuously locally bending the pipe in opposite direction to form anuniform coil of or turn of the coil, continuously locally bending thepipe or rod in opposite direction to form a coil of desired curvature.

12. As an improvement in the art of coiling pipe While cold, the methodwhich consists in continuously feeding the pipe, continuously operatinglocally upon said pipe while continuously fed to cause the same to tendto take a curvature other than desired curvaturefand then, Whilesimultaneously continuously fed, continuously operating 10- cally uponthe pipe to-cause the same to take another curvature to form an uniformcoil.

13. As an improvement in the art-of coiling pipe while cold, the methodwhich consists in continuously feeding the pipe con-'- tinuouslyoperating upon the pipe by roller bending actionto cause the/pipe totend to form a coil of other than desired diameter,

and then, while simultaneously continuously fed, continuously operatingupon the pipe by roller bending action to cause the pipe to form a coilof desired and uniform diameter.

14. As an improvement inthe art of coiling pipe While cold, the methodwhich consists in continuously feeding the pipe,.continuously operatingupon thepipe to cause the same to tend to form a coil of less thandesired diameter, and then, while continuously fed, operating upon thepipe in opposite direction to cause the same to form a coil of desiredand uniform diameter, both said operations upon the pipe occurringwithin a relatively short length thereof.

In testimony whereof I have hereunto afiixed my signature in thepresence of the two subscribing witnesses.

LEOPOLD C. SCHNEIDER.

In the presence of I T. G, PHINNY, G. M. HARDEN.

